Question

X^4-x^2-56 by splitting middle term

Answer 1

Answer:

The first term is,  x4  its coefficient is  1 .

The middle term is,  -x2  its coefficient is  -1 .

The last term,  is  -56

x^4 - 8x^2 + 7x^2 - 56

x^2 • (x^2-8)

7 • (x^2-8)

(x^2+7)  •  (x^2-8)

Here is your answer

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Answer 2

Answer:

Step-by-step explanation:

I assume the task is to factorise the polynomial.

Let y = x², then

y² - y - 56 = (y - 8)(y + 7)

(x² - 8)(x² + 7) = (x² + 7)(x - 2√2)(x + 2√2)